Constant-expansion glass-sealed iron-nickel-cobalt alloy, Kovar alloy, has a linear thermal expansion coefficient similar to that of hard glass within a certain temperature range.
Usage: It is used for matching and sealing with hard glass.
The density of this alloy is ρ=8.17g/cm³.
The product varieties are: cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube, hot-rolled (forged) flat, wire rod, hot-rolled (forged) bar, and cold-drawn bar.
Applicable standard: YB/T 5231-2014.
NILO alloy K(UNSK94610/ W.N.1.3981), a nickel-iron-cobalt alloy, contains approximately 29% nickel and 17% cobalt. Its thermal expansion properties match those of borosilicate glass and alumina ceramics. It is manufactured to be close to the chemical range, generating repeatable properties, making it highly suitable for glass-metal seals in large-scale production applications or for use in situations where reliability is of critical importance.
